Firefox 11: Cannot access memory at address 0x0

Question

Firefox 11: Cannot access memory at address 0x0

molnarg opened this issue 10 years ago · comments

I get this error when trying to use unmask_jemalloc for Firefox 11:

(gdb) jechunks 
[unmask_jemalloc] parsing structures from memory...
warning: value truncated
Python Exception <class 'gdb.MemoryError'> Cannot access memory at address 0x0: 
Error occurred in Python command: Cannot access memory at address 0x0

Is this version of firefox too old and unsupported by the current version of unmask_jemalloc?

argp · Answer 1 · Tue Mar 11 2014 16:27:12 GMT+0800 (China Standard Time)

Actually the first version of unmask_jemalloc was tested on Firefox 11. I'll try to take a look. Are you trying on Linux? 32 or 64 bit system? GDB version?

Gábor Molnár · Answer 2 · Tue Mar 11 2014 19:04:56 GMT+0800 (China Standard Time)

Thanks for looking into it! I'm on 64 bit Linux system, debugging a 32 bit Firefox 11 with GDB version 7.6.1-46.fc19

argp · Answer 3 · Fri Oct 03 2014 19:23:04 GMT+0800 (China Standard Time)

Oops, I totally forgot about this, sorry!

If you're still interested, I just pushed changes that worked for me on Firefox 11.0 with gdb 7.7 (which embeds python3).

Gábor Molnár · Answer 4 · Sat Oct 04 2014 02:46:55 GMT+0800 (China Standard Time)

This was required for a project of mine, and do not really need this capability anymore. But thanks for updating the code. I'm sure I will find this useful sometime in the future :) Now closing the ticket!